Stove.



l. S. VAN BUREN.

STOVE.

APPLICATION FILED MAR. 22. 1913.

Patented Nov. 21, 1916.

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STOVE.

APPLlGATlON FILED MAR. 22. 1913.

Patented Nov, 21, 1916.

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J. s. VAN BUREN.

STOVE.

APPLICATION HLED MAR-22.19I3.

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JAFEW S. VAN BUREN, OF ALBANY, NEW YORK.

STOVE.

Specification of Letters Patent.

Patented Nov. 21, 1916.

Application filed March 22, 1913. Serial No. 756,253.

To all 'whom it may concern Be it known that I, JAFEw S. VAN BUREN, a citizen of the United States, residing at Albany, in the county of Albany and State of New York have invented certain new and useful Improvements in Stoves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention is a stove, having for its main object to equip the same as a heating stove to burn a varied fuel, such for example as bituminous coal, anthracite coal or wood and at the same time produce a maximum amount of heat.

A further purpose of the invention is to so assemble the various parts thereof that the stove may be readily and quickly changed from a soft coal to a hard coal burner, or vice versa, as may be desired.

The use of soft or bituminous coal results in the production of a great volume of smoke and gas when fuel is added to the main combustion chamber. This device aims to pass the products of combustion, such as smoke and gas, through a highly heated combustion flue which I have termed a smoke burning flue, where the gases and smoke are compressed and consumed prior to their passage through the chimney, thereby overcoming a serious objection to the use of soft coal in these burners and at the same time securing an increased amount of heat units from a stove of given capacity. 7

With these ends in view, the invention embodies a primary combustion chamber and a superposed secondary, circulating chamber, said chambers being separated by a division wall through which a suitablepassage is provided. A removable central combustion flue is mounted within the primary combustion chamber and secondary circulating chamber for the consumption of the products f combustion, said combustion flue being preferably in a plurality of sections. The division wall is provided, also, with a secondary opening or draft opening, which is closed by a removable door operated automatically by the opening and closing of the main feed door to the combustion chamber. The combustion flue, therefore, may be considered a secondary combustion chamber.-

The invention consists, also, in the combination. and arrangement of parts as will be more fully shown in the drawings, set forth in the specification and pointed out in the appended claims.

One embodiment of the invention is illustrated in the accompanying drawings in which Figure 1 is a vertical sectional view through a stove having the invention applied thereto. Fig. 2 is a horizontal sectional view on the line 22 of Fig. 1 showing the division wall in plan. Fig. 3 is a horizontal section on the line 3-3 of Fig. 1. Fig. 4 is a detail view of the pivoted draft door mounted on the division wall. Fig. 5 is a detail vertical sectional view showing the stove adapted for burning hard coal.

In the embodiment of the invention illustrated in the drawings, the stove is shown provided with the usual base portion and fire box, indicated at 10, and a primary combustion chamber 11. This combustion chamber may be of any desired type or form, but in the drawings I have shown it provided with substantially conical wall, or converging wall 12, said wall having a feed opening which is adapted to be closed by a main feed door 13. A projecting vertical wall lat connects with the wall 12 of the opening to prevent the escape of smoke and gases from the stove, as will be readily understood.

At the upper end of the combustion chamber, the wall 12 is provided with an inturned flange shown as having two bearing surfaces 15 and 15*, although it is obvious that the flange may be otherwise constructed.

A division wall 16 is adapted to be seated upon this flange, having its depending annular rim 17 engaging the bearing surface 15, while its annular rim 18 is designed to rest upon the seat 15*. This division wall 16 is provided with a main opening, shown positioned substantially central thereof and indicated at 19. secondary opening 20 is preferably positioned in one of the inclined members of the wall. If desired, the division wall 16 may be further supported in the stove by its upper curved edge 22 resting upon the side walls of the stove and held in position by its shoulder 23. The upper portion of this division wall is preferably provided with a. flange 2a. The division wall 16 is further provided with an open- .the stove,

ing 25 therethrough to permit of the passage of a hot air flue 26 whereby heat may be delivered directly into the room or into a room above through a suitable conducting pipe. This hot air flue is shown in Fig. 1 of the drawings as receiving the heat from the conical wall 12 and conducting the same through the flue 26 upwardly.

The division wall 16 separates the upper portion of the stove into the combustion chamber 11 and a circulating chamber 27. This circulating chamber extends from the division wall 16 to the top plate 28 of the stove. An opening is preferably provided in this top plate of the stove, around which opening is formed a flange 29. This opening may be closed in any suitable manner, as by the cover 30. The circulating chamber comprises the whole upper portion of the stove above the division wall 16, and joins into the chimney fine 31. By mounting the hot air. flue 26 within the circulating chamber 27, the walls of the flue will be heated by the passage of gases through the circulating chamber out of the chimney flue, and thereby increase the amount of heat directed through said flue 26.

I An important feature of this invention resides in' the combined fuel conductor and combustion flue. disclosed in Fig. 1. This flue is shown comprising two sections 32, 33.

The lower section 32 is composed of an outer metallic wall 34, preferably lined with fire brick, indicated at which become highly heated and serve to convert the small par ticles of coal into a gas to completely consume the same. Accordingly, I have termed this lined cylindrical member a smoke burning" flue. The upper end of the wall 84 is provided with an annular flange 36 which is adapted to rest upon the flange 18 of the division wall for supporting the smoke burning flue within the combustion. chamber. The upper section of this smoke burning flue is shown so mounted within the circulating chamber that the lower end thereof rests upon the lower section of the smoke burning flue, while its upper end is provided with a flange 37 adapted to be seated upon the flange 29 0f the top of the stove. This upper section of the smoke burning flue is provided with a wall 38, similar to the wall 3st of the lower section, with the exception that a portion of this wall is cut away, as at a preferably at a point opposite to the exit for smoke and gases to the chimney flue, will be understood from an inspection of Fig. 1. To prevent the upper section from moving out of this preferred position, I have providedsuitable stop members, inic ted a wh ch are adapted to abut against the wall 38 and guide the operator in inserting the upper s'ection'of the smoke burn ng flue in its proper position Wltllln The maklng of this upper section readily removable from the stove, permits of the easy cleaning of the circulating chamber from the accumulation resulting from the combustion of soft coal, or other fuel. The upper section is provided, also, with fire brick 35, similar to those disclosed in the lower sections. Suitable means are provided, not shown in the drawings, for admittingair to the combustion chamber to be directed up through the retort, whereby the gases and smoke will be commingled with the air and consumed during the passage of the products through the smoke burning flue to the circulating chamber. When a fire has been made in thestove and the air admitted to the combustion chamber, the amount ofheat generated will heat the interior of the retort to incandescence, and the passage of smoke and gases through this intensely heated smoke burning flue toward the circulating chamber and the chimney flue will cause said gases to be expanded and consumed, the smoke burning flue thereby operating to compress the gases, owing to. the fact that the smoke and gas cannot pass through the said flue at a greater speed than will be permitted by the reduced. opening 40 of thefchimney flue. In the drawings, it will be noticed that the opening L0 is of considerably less diameter than that of the. smoke burning flue. R.

Surrounding the walls of the combustion chamber may be provided a suitable outer heat directing wall or panel 4-1.

The spacev between the walls l t-14: is preferablyequal to one-fourth of the circumference of the stove, although any other' by when the feed door is opened, the pivoted,

draft door %2 will automatically move to an open position, which will operate to draw off the gases from the combustion'chamber 11, and thereby prevent their'escape through the feed door opening.

letof the open d aft .door and close said draft door e2 at the same time the feed door 13 is closed, thereby reestablishing the normal flow of the products ofcombustion through the smoke burning flue and com bustion chamber.

Fig. 1, and to pass the arm in its outward movement through a suitable guiding slot In closing the fuel door 13;, it Wlll engage the depending arm It is preferable to make th1s arm 44 arcuate n form, as illustrated in 44, in a wall of the stove. In this event, the feed door is provided with an extension 13 which is adapted to contact with the arm it.

The foregoing description applies to the stove when used to consume bituminous coal. When it is desired to use a hard or anthracite coal, both sections of the smoke burning flue R are lifted out of the stove and a single magazine cylinder M is inserted in the space formerly occupied by the retort R. This magazine is preferably composed of metal having an upper protruding flange 45 adapted to rest upon the flange 29 of the top opening and an intermediate flange 46 adapted to rest upon the flange 18 of the division wall. The door 42 is now removed from the division wall, whereupon the stove is adapted for burning hard coal, the opening :20 serving to conduct the products of combustion from the combustion chamber 11, through the circulating chamber 27. The stove may now be supplied with fuel through its opening in the top, filling the magazine M, instead of through the main feed door 13.

Vhen it is desired to employ the stove for consuming a wood fuel, both of the flue sections are removed or the magazine portion M is removed, throwing the combustion chamber 11 and circulating member 27 into one continuous chamber.

Having thus fully described my inven tion, what I claim as new and desire to secure by Letters Patent is:

1. In a stove, the combination with a combustion chamber and a circulating chamber having a rear exit flue, of a quickly removable sectional combustion flue mounted between the combustion chamber and the exit flue, said combustion flue being covered throughout its inner surface with refractory material, the upper section of the combustion flue being positioned in the circulating chamber and having a longitudinal opening positioned to permit of the passage of products of combustion in the direction opposite to the exit flue, the exit opening being of less area than the combustion flue opening,

whereby smoke and gases may be retarded in their outward circulating passage and 1t lonsumed prior to passage through the exit 2. In a stove having an exit flue and a top with a substantially central opening, a division wall to separate a combustion chamber from a superposed circulating chamber, a sectional lined combustion flue having a lower section suspended from said division wall and removable through said top, and another section extending the full depth of the circulating chamber and suspended from the top into contact with the division wall and in alinement with said lower section, said upper section being adapted for quick removal from the circulating chamber for the purpose of cleaning the same independently of the lower section.

3. In a stove, a combustion chamber, a circulating chamber positioned above the combustion chamber and communicating with an opening in the top of the stove and with an exit flue, and a combustion flue comprising a plurality of sections, one section being immersed within the combustion chamber and,..a'dapted to be removed from the circulating section through the top of the stove, and another section removably mounted within the circulating chamber and having an opening in a part of its side wall which is opposite to the exit flue.

4. A stove comprising a base, a fire box section, a combustion section having a wall contracted at the upper end thereof and provided with a main feed door, a division wall of greater diameter than the combustion section and adapted to rest upon the contracted end of the combustion wall, said division wall being provided with a central opening and a gravity draft door, means to close the draft door simultaneously with the feed door, a cover element adapted to rest on said division wall to form a circulating chamber which is closed except for said gravity door, a top opening and the exit flue, and means to close the top opening.

centrally within the circulating chamber and the combustion chamber, the lower section of said flue being passed through the opening of the division wall to be suspended within the combustion chamber, said section being maintained in position by having an outwardly directed flange at its upper end seated upon the flange of the opening, the lower end of said section of the flue being provided with an inwardly directed flange, the upper section of said flue having an outwardly directed flange adapted to be seated against the flange of the top plate to suspend said upper section within the circulating chamber, said upper section registering with the lower section to form a con tinuation of the flue, and a sectional fire brick positioned within the sections of the flue, the fire brick sections being superimposed one upon the other. with the lowermost brick resting upon the inwardly di- Eected flange of the lower section of the 6. In a stove, a combustion chamber, a circulating chamber superposed over the combustion chamber, said chambers being a continuation of said first named section,

said top section having a longitudinal opening communicating with the circulating chamber. i

7/ A stove having a horizontally arranged division Wall to separate a combustion chamber from a circulating chamber, said division wall being provided with an inclined lower section which terminates in an annular flanged opening, said'inclined wall being provided also with a gas aperture, a draft door pivoted at its upper edge to the inclined section of the division wall to close said aperture, said door being provided with a downwardly and outwardly directed arm,

'a feed door for the combustion chamber adapted to engage the arm of the draft door, to maintain the draft doorin a closed position when the feed door is closed, a continuous sectional removable flue, the lower section of which is in the form of a cylinder and suspended Within the combustion chamber and the upper section of said flue being suspended from the top of the stove within the circulating chamber, said upper section having that portion of its Wall cut away Which is in alinement with the gas aperture of the inclined division wall, whereby upon the opening of the feed door, the aperture in the lower section of the division wall will be automatically opened for the purpose of conveying away from the combustion chamber and the feed door through the gas aperture into the circulating chamber any accumulation of products of combustion which may not escape through the lower section of the flue to said circulating chamber.

In testimony whereof, I affix my signature, in presence of two witnesses.

JAFEW s. VAN BUR-EN.

- \Vitnesses J. E. Co'rrRnLL, CHAS. Voss.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 1). c. 

